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# Copyright (C) 2006, 2007 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Author: Aaron Bentley <aaron.bentley@utoronto.ca>
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"""Black-box tests for bzr merge.
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class TestMerge(tests.TestCaseWithTransport):
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def example_branch(self, path='.'):
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tree = self.make_branch_and_tree(path)
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self.build_tree_contents([
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(osutils.pathjoin(path, 'hello'), 'foo'),
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(osutils.pathjoin(path, 'goodbye'), 'baz')])
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tree.commit(message='setup')
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tree.commit(message='setup')
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def create_conflicting_branches(self):
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"""Create two branches which have overlapping modifications.
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:return: (tree, other_branch) Where merging other_branch causes a file
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builder = self.make_branch_builder('branch')
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builder.build_snapshot('rev1', None,
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[('add', ('', 'root-id', 'directory', None)),
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('add', ('fname', 'f-id', 'file', 'a\nb\nc\n'))])
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builder.build_snapshot('rev2other', ['rev1'],
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[('modify', ('f-id', 'a\nB\nD\n'))])
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other = builder.get_branch().bzrdir.sprout('other').open_branch()
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builder.build_snapshot('rev2this', ['rev1'],
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[('modify', ('f-id', 'a\nB\nC\n'))])
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tree = builder.get_branch().create_checkout('tree', lightweight=True)
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def test_merge_reprocess(self):
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d = bzrdir.BzrDir.create_standalone_workingtree('.')
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self.run_bzr('merge . --reprocess --merge-type weave')
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a_tree = self.example_branch('a')
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ancestor = a_tree.branch.revno()
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b_tree = a_tree.bzrdir.sprout('b').open_workingtree()
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self.build_tree_contents([('b/goodbye', 'quux')])
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b_tree.commit(message="more u's are always good")
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self.build_tree_contents([('a/hello', 'quuux')])
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# We can't merge when there are in-tree changes
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self.run_bzr('merge ../b', retcode=3)
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a = workingtree.WorkingTree.open('.')
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a_tip = a.commit("Like an epidemic of u's")
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self.run_bzr('merge ../b -r last:1..last:1 --merge-type blooof',
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self.run_bzr('merge ../b -r last:1..last:1 --merge-type merge3')
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a_tree.revert(backups=False)
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self.run_bzr('merge ../b -r last:1..last:1 --merge-type weave')
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a_tree.revert(backups=False)
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self.run_bzr('merge ../b -r last:1..last:1 --merge-type lca')
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a_tree.revert(backups=False)
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self.run_bzr_error(['Show-base is not supported for this merge type'],
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'merge ../b -r last:1..last:1 --merge-type weave'
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a_tree.revert(backups=False)
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self.run_bzr('merge ../b -r last:1..last:1 --reprocess')
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a_tree.revert(backups=False)
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self.run_bzr('merge ../b -r last:1')
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self.check_file_contents('goodbye', 'quux')
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# Merging a branch pulls its revision into the tree
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b = branch.Branch.open('../b')
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b_tip = b.last_revision()
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self.failUnless(a.branch.repository.has_revision(b_tip))
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self.assertEqual([a_tip, b_tip], a.get_parent_ids())
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a_tree.revert(backups=False)
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out, err = self.run_bzr('merge -r revno:1:./hello', retcode=3)
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self.assertTrue("Not a branch" in err)
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self.run_bzr('merge -r revno:%d:./..revno:%d:../b'
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%(ancestor,b.revno()))
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self.assertEquals(a.get_parent_ids(),
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[a.branch.last_revision(), b.last_revision()])
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self.check_file_contents('goodbye', 'quux')
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a_tree.revert(backups=False)
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self.run_bzr('merge -r revno:%d:../b'%b.revno())
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self.assertEquals(a.get_parent_ids(),
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[a.branch.last_revision(), b.last_revision()])
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a_tip = a.commit('merged')
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self.run_bzr('merge ../b -r last:1')
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self.assertEqual([a_tip], a.get_parent_ids())
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def test_merge_defaults_to_reprocess(self):
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tree, other = self.create_conflicting_branches()
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# The default merge algorithm should enable 'reprocess' because
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# 'show-base' is not set
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self.run_bzr('merge ../other', working_dir='tree',
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self.assertEqualDiff('a\n'
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'>>>>>>> MERGE-SOURCE\n',
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tree.get_file_text('f-id'))
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def test_merge_explicit_reprocess_show_base(self):
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tree, other = self.create_conflicting_branches()
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# Explicitly setting --reprocess, and --show-base is an error
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self.run_bzr_error(['Cannot do conflict reduction and show base'],
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'merge ../other --reprocess --show-base',
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def test_merge_override_reprocess(self):
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tree, other = self.create_conflicting_branches()
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# Explicitly disable reprocess
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self.run_bzr('merge ../other --no-reprocess', working_dir='tree',
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self.assertEqualDiff('a\n'
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'>>>>>>> MERGE-SOURCE\n',
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tree.get_file_text('f-id'))
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def test_merge_override_show_base(self):
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tree, other = self.create_conflicting_branches()
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# Setting '--show-base' will auto-disable '--reprocess'
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self.run_bzr('merge ../other --show-base', working_dir='tree',
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self.assertEqualDiff('a\n'
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'||||||| BASE-REVISION\n'
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'>>>>>>> MERGE-SOURCE\n',
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tree.get_file_text('f-id'))
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def test_merge_with_missing_file(self):
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"""Merge handles missing file conflicts"""
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self.build_tree_contents([
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('a/sub/a.txt', 'hello\n'),
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('a/b.txt', 'hello\n'),
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('a/sub/c.txt', 'hello\n')])
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a_tree = self.make_branch_and_tree('a')
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a_tree.add(['sub', 'b.txt', 'sub/c.txt', 'sub/a.txt'])
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a_tree.commit(message='added a')
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b_tree = a_tree.bzrdir.sprout('b').open_workingtree()
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self.build_tree_contents([
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('a/sub/a.txt', 'hello\nthere\n'),
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('a/b.txt', 'hello\nthere\n'),
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('a/sub/c.txt', 'hello\nthere\n')])
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a_tree.commit(message='Added there')
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os.remove('a/sub/a.txt')
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os.remove('a/sub/c.txt')
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a_tree.commit(message='Removed a.txt')
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self.build_tree_contents([
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('b/sub/a.txt', 'hello\nsomething\n'),
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('b/b.txt', 'hello\nsomething\n'),
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('b/sub/c.txt', 'hello\nsomething\n')])
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b_tree.commit(message='Modified a.txt')
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self.run_bzr('merge ../a/', retcode=1)
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self.failUnlessExists('sub/a.txt.THIS')
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self.failUnlessExists('sub/a.txt.BASE')
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self.run_bzr('merge ../b/', retcode=1)
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self.failUnlessExists('sub/a.txt.OTHER')
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self.failUnlessExists('sub/a.txt.BASE')
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def test_merge_remember(self):
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"""Merge changes from one branch to another, test submit location."""
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tree_a = self.make_branch_and_tree('branch_a')
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branch_a = tree_a.branch
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self.build_tree(['branch_a/a'])
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tree_a.commit('commit a')
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branch_b = branch_a.bzrdir.sprout('branch_b').open_branch()
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tree_b = branch_b.bzrdir.open_workingtree()
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branch_c = branch_a.bzrdir.sprout('branch_c').open_branch()
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tree_c = branch_c.bzrdir.open_workingtree()
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self.build_tree(['branch_a/b'])
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tree_a.commit('commit b')
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self.build_tree(['branch_c/c'])
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tree_c.commit('commit c')
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parent = branch_b.get_parent()
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branch_b.set_parent(None)
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self.assertEqual(None, branch_b.get_parent())
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# test merge for failure without parent set
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out = self.run_bzr('merge', retcode=3)
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self.assertEquals(out,
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('','bzr: ERROR: No location specified or remembered\n'))
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# test uncommitted changes
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self.build_tree(['d'])
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self.run_bzr_error(['Working tree ".*" has uncommitted changes'],
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# merge should now pass and implicitly remember merge location
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tree_b.commit('commit d')
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out, err = self.run_bzr('merge ../branch_a')
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base = urlutils.local_path_from_url(branch_a.base)
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self.assertEndsWith(err, '+N b\nAll changes applied successfully.\n')
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self.assertEquals(osutils.abspath(branch_b.get_submit_branch()),
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osutils.abspath(parent))
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# test implicit --remember when committing new file
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self.build_tree(['e'])
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tree_b.commit('commit e')
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out, err = self.run_bzr('merge')
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self.assertStartsWith(err,
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'Merging from remembered submit location %s\n' % (base,))
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# re-open tree as external run_bzr modified it
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tree_b = branch_b.bzrdir.open_workingtree()
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tree_b.commit('merge branch_a')
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# test explicit --remember
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out, err = self.run_bzr('merge ../branch_c --remember')
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self.assertEquals(out, '')
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self.assertEquals(err, '+N c\nAll changes applied successfully.\n')
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self.assertEquals(osutils.abspath(branch_b.get_submit_branch()),
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osutils.abspath(branch_c.bzrdir.root_transport.base))
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# re-open tree as external run_bzr modified it
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tree_b = branch_b.bzrdir.open_workingtree()
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tree_b.commit('merge branch_c')
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def test_merge_bundle(self):
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from bzrlib.testament import Testament
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tree_a = self.make_branch_and_tree('branch_a')
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self.build_tree_contents([('branch_a/a', 'hello')])
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tree_a.commit('message')
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tree_b = tree_a.bzrdir.sprout('branch_b').open_workingtree()
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self.build_tree_contents([('branch_a/a', 'hey there')])
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tree_a.commit('message')
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self.build_tree_contents([('branch_b/a', 'goodbye')])
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tree_b.commit('message')
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self.run_bzr('bundle ../branch_a -o ../bundle')
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os.chdir('../branch_a')
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self.run_bzr('merge ../bundle', retcode=1)
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testament_a = Testament.from_revision(tree_a.branch.repository,
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tree_b.get_parent_ids()[0])
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testament_b = Testament.from_revision(tree_b.branch.repository,
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tree_b.get_parent_ids()[0])
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self.assertEqualDiff(testament_a.as_text(),
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testament_b.as_text())
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tree_a.set_conflicts(conflicts.ConflictList())
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tree_a.commit('message')
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# it is legal to attempt to merge an already-merged bundle
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output = self.run_bzr('merge ../bundle')[1]
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# but it does nothing
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self.assertFalse(tree_a.changes_from(tree_a.basis_tree()).has_changed())
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self.assertEqual('Nothing to do.\n', output)
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def test_merge_uncommitted(self):
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"""Check that merge --uncommitted behaves properly"""
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tree_a = self.make_branch_and_tree('a')
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self.build_tree(['a/file_1', 'a/file_2'])
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tree_a.add(['file_1', 'file_2'])
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tree_a.commit('commit 1')
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tree_b = tree_a.bzrdir.sprout('b').open_workingtree()
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self.failUnlessExists('b/file_1')
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tree_a.rename_one('file_1', 'file_i')
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tree_a.commit('commit 2')
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tree_a.rename_one('file_2', 'file_ii')
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self.run_bzr('merge a --uncommitted -d b')
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self.failUnlessExists('b/file_1')
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self.failUnlessExists('b/file_ii')
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self.run_bzr_error(('Cannot use --uncommitted and --revision',),
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'merge /a --uncommitted -r1 -d b')
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def test_merge_uncommitted_file(self):
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"""It should be possible to merge changes from a single file."""
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tree_a = self.make_branch_and_tree('tree_a')
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tree_a.commit('initial commit')
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tree_a.bzrdir.sprout('tree_b')
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self.build_tree(['tree_a/file1', 'tree_a/file2'])
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tree_a.add(['file1', 'file2'])
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self.run_bzr(['merge', '--uncommitted', '../tree_a/file1'])
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self.failUnlessExists('file1')
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self.failIfExists('file2')
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def pullable_branch(self):
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tree_a = self.make_branch_and_tree('a')
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self.build_tree(['a/file'])
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self.id1 = tree_a.commit('commit 1')
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tree_b = self.make_branch_and_tree('b')
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tree_b.pull(tree_a.branch)
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file('b/file', 'wb').write('foo')
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self.id2 = tree_b.commit('commit 2')
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def test_merge_pull(self):
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self.pullable_branch()
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(out, err) = self.run_bzr('merge --pull ../b')
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self.assertContainsRe(out, 'Now on revision 2\\.')
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tree_a = workingtree.WorkingTree.open('.')
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self.assertEqual([self.id2], tree_a.get_parent_ids())
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def test_merge_kind_change(self):
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tree_a = self.make_branch_and_tree('tree_a')
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self.build_tree_contents([('tree_a/file', 'content_1')])
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tree_a.add('file', 'file-id')
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tree_a.commit('added file')
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tree_b = tree_a.bzrdir.sprout('tree_b').open_workingtree()
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os.unlink('tree_a/file')
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self.build_tree(['tree_a/file/'])
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tree_a.commit('changed file to directory')
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self.run_bzr('merge ../tree_a')
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self.assertEqual('directory', osutils.file_kind('file'))
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self.assertEqual('file', osutils.file_kind('file'))
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self.build_tree_contents([('file', 'content_2')])
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tree_b.commit('content change')
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self.run_bzr('merge ../tree_a', retcode=1)
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self.assertEqual(tree_b.conflicts(),
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[conflicts.ContentsConflict('file',
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def test_directive_cherrypick(self):
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source = self.make_branch_and_tree('source')
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source.commit("nothing")
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# see https://bugs.edge.launchpad.net/bzr/+bug/409688 - trying to
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# cherrypick from one branch into another unrelated branch with a
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# different root id will give shape conflicts. as a workaround we
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# make sure they share the same root id.
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target = source.bzrdir.sprout('target').open_workingtree()
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self.build_tree(['source/a'])
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source.commit('Added a', rev_id='rev1')
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self.build_tree(['source/b'])
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source.commit('Added b', rev_id='rev2')
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target.commit('empty commit')
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self.write_directive('directive', source.branch, 'target', 'rev2',
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out, err = self.run_bzr('merge -d target directive')
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self.failIfExists('target/a')
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self.failUnlessExists('target/b')
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self.assertContainsRe(err, 'Performing cherrypick')
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def write_directive(self, filename, source, target, revision_id,
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base_revision_id=None, mangle_patch=False):
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md = merge_directive.MergeDirective2.from_objects(
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source.repository, revision_id, 0, 0, target,
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base_revision_id=base_revision_id)
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self.build_tree_contents([(filename, ''.join(md.to_lines()))])
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def test_directive_verify_warning(self):
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source = self.make_branch_and_tree('source')
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self.build_tree(['source/a'])
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source.commit('Added a', rev_id='rev1')
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target = self.make_branch_and_tree('target')
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target.commit('empty commit')
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self.write_directive('directive', source.branch, 'target', 'rev1')
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err = self.run_bzr('merge -d target directive')[1]
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self.assertNotContainsRe(err, 'Preview patch does not match changes')
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self.write_directive('directive', source.branch, 'target', 'rev1',
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err = self.run_bzr('merge -d target directive')[1]
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self.assertContainsRe(err, 'Preview patch does not match changes')
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def test_merge_arbitrary(self):
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target = self.make_branch_and_tree('target')
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target.commit('empty')
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# We need a revision that has no integer revno
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branch_a = target.bzrdir.sprout('branch_a').open_workingtree()
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self.build_tree(['branch_a/file1'])
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branch_a.add('file1')
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branch_a.commit('added file1', rev_id='rev2a')
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branch_b = target.bzrdir.sprout('branch_b').open_workingtree()
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self.build_tree(['branch_b/file2'])
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branch_b.add('file2')
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branch_b.commit('added file2', rev_id='rev2b')
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branch_b.merge_from_branch(branch_a.branch)
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self.failUnlessExists('branch_b/file1')
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branch_b.commit('merged branch_a', rev_id='rev3b')
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# It works if the revid has an interger revno
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self.run_bzr('merge -d target -r revid:rev2a branch_a')
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self.failUnlessExists('target/file1')
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self.failIfExists('target/file2')
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# It should work if the revid has no integer revno
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self.run_bzr('merge -d target -r revid:rev2a branch_b')
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self.failUnlessExists('target/file1')
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self.failIfExists('target/file2')
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def assertDirectoryContent(self, directory, entries, message=''):
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"""Assert whether entries (file or directories) exist in a directory.
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It also checks that there are no extra entries.
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ondisk = os.listdir(directory)
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if set(ondisk) == set(entries):
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raise AssertionError(
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'%s"%s" directory content is different:\na = %s\nb = %s\n'
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% (message, directory, sorted(entries), sorted(ondisk)))
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def test_cherrypicking_merge(self):
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source = self.make_branch_and_tree('source')
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for f in ('a', 'b', 'c', 'd'):
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self.build_tree(['source/'+f])
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source.commit('added '+f, rev_id='rev_'+f)
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target = source.bzrdir.sprout('target', 'rev_a').open_workingtree()
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self.assertDirectoryContent('target', ['.bzr', 'a'])
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self.run_bzr('merge -d target -r revid:rev_b..revid:rev_c source')
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self.assertDirectoryContent('target', ['.bzr', 'a', 'c'])
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self.run_bzr('merge -d target -r revid:rev_b..revid:rev_d source')
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self.assertDirectoryContent('target', ['.bzr', 'a', 'c', 'd'])
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# pick 1 revision with option --changes
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self.run_bzr('merge -d target -c revid:rev_d source')
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self.assertDirectoryContent('target', ['.bzr', 'a', 'd'])
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def test_merge_criss_cross(self):
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tree_a = self.make_branch_and_tree('a')
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tree_a.commit('', rev_id='rev1')
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tree_b = tree_a.bzrdir.sprout('b').open_workingtree()
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tree_a.commit('', rev_id='rev2a')
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tree_b.commit('', rev_id='rev2b')
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tree_a.merge_from_branch(tree_b.branch)
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tree_b.merge_from_branch(tree_a.branch)
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tree_a.commit('', rev_id='rev3a')
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tree_b.commit('', rev_id='rev3b')
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graph = tree_a.branch.repository.get_graph(tree_b.branch.repository)
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out, err = self.run_bzr(['merge', '-d', 'a', 'b'])
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self.assertContainsRe(err, 'Warning: criss-cross merge encountered.')
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def test_merge_from_submit(self):
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tree_a = self.make_branch_and_tree('a')
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tree_b = tree_a.bzrdir.sprout('b').open_workingtree()
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tree_c = tree_a.bzrdir.sprout('c').open_workingtree()
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out, err = self.run_bzr(['merge', '-d', 'c'])
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self.assertContainsRe(err, 'Merging from remembered parent location .*a\/')
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tree_c.branch.set_submit_branch(tree_b.bzrdir.root_transport.base)
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out, err = self.run_bzr(['merge', '-d', 'c'])
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self.assertContainsRe(err, 'Merging from remembered submit location .*b\/')
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def test_remember_sets_submit(self):
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tree_a = self.make_branch_and_tree('a')
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tree_b = tree_a.bzrdir.sprout('b').open_workingtree()
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self.assertIs(tree_b.branch.get_submit_branch(), None)
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# Remember should not happen if using default from parent
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out, err = self.run_bzr(['merge', '-d', 'b'])
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self.assertIs(tree_b.branch.get_submit_branch(), None)
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# Remember should happen if user supplies location
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out, err = self.run_bzr(['merge', '-d', 'b', 'a'])
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self.assertEqual(tree_b.branch.get_submit_branch(),
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tree_a.bzrdir.root_transport.base)
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def test_weave_cherrypick(self):
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this_tree = self.make_branch_and_tree('this')
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self.build_tree_contents([('this/file', "a\n")])
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this_tree.add('file')
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this_tree.commit('rev1')
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other_tree = this_tree.bzrdir.sprout('other').open_workingtree()
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self.build_tree_contents([('other/file', "a\nb\n")])
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other_tree.commit('rev2b')
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self.build_tree_contents([('other/file', "c\na\nb\n")])
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other_tree.commit('rev3b')
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self.run_bzr('merge --weave -d this other -r -2..-1')
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self.assertFileEqual('c\na\n', 'this/file')
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def test_lca_merge_criss_cross(self):
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tree_a = self.make_branch_and_tree('a')
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self.build_tree_contents([('a/file', 'base-contents\n')])
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tree_a.commit('', rev_id='rev1')
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tree_b = tree_a.bzrdir.sprout('b').open_workingtree()
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self.build_tree_contents([('a/file',
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'base-contents\nthis-contents\n')])
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tree_a.commit('', rev_id='rev2a')
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self.build_tree_contents([('b/file',
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'base-contents\nother-contents\n')])
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tree_b.commit('', rev_id='rev2b')
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tree_a.merge_from_branch(tree_b.branch)
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self.build_tree_contents([('a/file',
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'base-contents\nthis-contents\n')])
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tree_a.set_conflicts(conflicts.ConflictList())
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tree_b.merge_from_branch(tree_a.branch)
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self.build_tree_contents([('b/file',
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'base-contents\nother-contents\n')])
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tree_b.set_conflicts(conflicts.ConflictList())
558
tree_a.commit('', rev_id='rev3a')
559
tree_b.commit('', rev_id='rev3b')
560
out, err = self.run_bzr(['merge', '-d', 'a', 'b', '--lca'], retcode=1)
561
self.assertFileEqual('base-contents\n<<<<<<< TREE\nthis-contents\n'
562
'=======\nother-contents\n>>>>>>> MERGE-SOURCE\n',
565
def test_merge_preview(self):
566
this_tree = self.make_branch_and_tree('this')
567
this_tree.commit('rev1')
568
other_tree = this_tree.bzrdir.sprout('other').open_workingtree()
569
self.build_tree_contents([('other/file', 'new line')])
570
other_tree.add('file')
571
other_tree.commit('rev2a')
572
this_tree.commit('rev2b')
573
out, err = self.run_bzr(['merge', '-d', 'this', 'other', '--preview'])
574
self.assertContainsRe(out, '\+new line')
575
self.assertNotContainsRe(err, '\+N file\n')
576
this_tree.lock_read()
577
self.addCleanup(this_tree.unlock)
579
list(this_tree.iter_changes(this_tree.basis_tree())))
581
def test_merge_missing_second_revision_spec(self):
582
"""Merge uses branch basis when the second revision is unspecified."""
583
this = self.make_branch_and_tree('this')
585
other = self.make_branch_and_tree('other')
586
self.build_tree(['other/other_file'])
587
other.add('other_file')
588
other.commit('rev1b')
589
self.run_bzr('merge -d this other -r0..')
590
self.failUnlessExists('this/other_file')
593
class TestMergeForce(tests.TestCaseWithTransport):
596
super(TestMergeForce, self).setUp()
597
self.tree_a = self.make_branch_and_tree('a')
598
self.build_tree(['a/foo'])
599
self.tree_a.add(['foo'])
600
self.tree_a.commit('add file')
601
self.tree_b = self.tree_a.bzrdir.sprout('b').open_workingtree()
602
self.build_tree_contents([('a/foo', 'change 1')])
603
self.tree_a.commit('change file')
604
self.tree_b.merge_from_branch(self.tree_a.branch)
606
def test_merge_force(self):
607
self.tree_a.commit('empty change to allow merge to run')
608
# Second merge on top of the uncommitted one
609
self.run_bzr(['merge', '../a', '--force'], working_dir='b')
612
def test_merge_with_uncommitted_changes(self):
613
self.run_bzr_error(['Working tree .* has uncommitted changes'],
614
['merge', '../a'], working_dir='b')
616
def test_merge_with_pending_merges(self):
617
# Revert the changes keeping the pending merge
618
self.run_bzr(['revert', 'b'])
619
self.run_bzr_error(['Working tree .* has uncommitted changes'],
620
['merge', '../a'], working_dir='b')
added
removed
bzrlib/tests/blackbox/test_merge.py
